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A car traveling at speed v takes distance D to stop after the brakes are applied. What is the stopping distance if the car is initially traveling at speed 1.5v? Assume that the acceleration due to the braking is the same in both cases. A car moving with an initial speed v on a straight road can be stopped with a distance D on applying brakes. If the same car is moving with a speed 3v and brakes provide half retardation, what is the new stopping distance in terms of D?